SCAN IP's can be used for ftp ,sftp and also ssh connection
during rac cluster service already running .
Because when cluster services are running scan ip's nic bonding to public
network interface for example ;
In RAC Node1
oracle@testdbrac1:/oracle:>ifconfig -a
eth0 Link encap:Ethernet
HWaddr 00:50:56:B8:40:B0
inet addr:PUBLIC
IP Bcast:xxx.x.x.xxx Mask:255.255.255.0
inet6
addr: fe80::250:56ff:feb8:40b0/64 Scope:Link
UP
BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX
packets:1006522 errors:0 dropped:0 overruns:0 frame:0
TX
packets:92530 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX
bytes:99913091 (95.2 MiB) TX bytes:32001574 (30.5 MiB)
eth0:2 Link encap:Ethernet HWaddr
00:50:56:B8:40:B0
inet addr:SCAN
IP_1 Bcast:xxx.x.x.xxx Mask:255.255.255.0
UP
BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
In RAC Node 2
oracle@testdbrac2:/oracle:>ifconfig -a
eth0 Link encap:Ethernet
HWaddr 00:50:56:B8:40:B1
inet addr:PUBLIC
IP Bcast:xxx.x.x.xxx Mask:255.255.255.0
inet6
addr: fe80::250:56ff:feb8:40b1/64 Scope:Link
UP
BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX
packets:1004162 errors:0 dropped:0 overruns:0 frame:0
TX
packets:69260 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX
bytes:100817580 (96.1 MiB) TX bytes:15328431 (14.6 MiB)
eth0:2 Link encap:Ethernet HWaddr
00:50:56:B8:40:B1
inet addr:SCAN
IP_2 Bcast:xxx.x.x.xxx Mask:255.255.255.0
UP
BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth0:3 Link encap:Ethernet HWaddr
00:50:56:B8:40:B1
inet addr:SCAN
IP_3 Bcast: xxx.x.x.xxx Mask:255.255.255.0
UP
BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
You can also check output command "ifconfig -a"
when rac services are not running. If you are planning for failover scenarios ,
it is reasonably.
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